Apparatus for the production of section iron with box-shaped cross sections



Oct. 21, 1930. J. MEISERE A 1,779,185

APPARATUS FOR THE PRODUCTION OF SECTION IRON WITH BOX SHAPED CROSSSECTIONS Filed Aug. 4, 1927 2 Sheets-Sheet 1 1/ I f 8 I va 71515 d" .9WW-""7- 1 #"1' l 13' .3. g; 1"" t- 7 g I z m l 2 Z 0 L E 2 Sheets-Sheet2 Oct. 21, 1930.

Patented Oct. 21, 1930 UNITED STATES JOSEF muslin. AND WILHELM xonnnn,or non'ruunn, GERMANY APPARATUS ron. THE PRODUCTION OF sEc'rioN monwr'rnnox-snarnn onoss SECTIONS Application filed August 4, 1927, SerialNo. 210,702, and in Germany August 14, 1926.

Our invention relates to apparatus for manufacturing section iron withbox-shaped cross section from iron tubes having comparatively thickwalls and for forming on the longitudinal sides of such sections filletsand channels, whereby adjacent sections may be made to interlock. Oflate years elongated girders or section iron have been needed inindustry, which have a box-shaped cross section, i. e., more or lessrectangular and with thick walls. Such box-shaped sections are speciallyrequired for'the construction of sheet-piling, in which case they shouldbe provided with connecting members, which allow of each member of thepiling interlocking with the adjacent one.

One of the primary objects of the present 1 invention is'the provisionof apparatus for making tubes of the character in question in anexpeditious and relatively inexpensive manner.

Our invention makes it possible to produce I such box-shaped sectionswithout seam and provided with connecting members adapted forinterlocking with adjacent members.

As is known no difficulties occur in making tubes of circular crosssection and having almost any desired thickness of wall, diameter andlength.= The invention is based on the idea thatfor the manufacture ofgirders with box-shaped cross section and provided with connectingmembers, a start should be made with circular tubes of correspondingthickness of wall and sufiicient diameter and that these tubes should beconverted into the desired form by box-passing and rolling down.

It is immaterial for the manufacture in view that the tubes should befautless. Therefore, both scrapped and used tubes can be employed.

According to the invention the change of shape is brought about inseveral stages, in

- the first place the tube of circular cross sec- 45 tion is convertedinto a tube the section of which approximates more or less to 9. rectangular shape; subsequently introverts are produced by [furthertreatment, which pro- I vide the interlocking members. The introversionis specially carried out 1n such way 'termediate operation not shown.

between the two other rolls.

that a fillet-shaped connecting member is formed on one side of the tubeand a dovetail channel-shaped member on the other side,

the latter being adapted to .enclose thefillet of an adjacent memberwith a good fit.

The treatment of the original tube and its conversion into the finishedshape through one or more intermediate shapes is carried out in thepresent instance by passing the work through sha ing rolls or throughdraw- 50 plates or by a com ination of both apparatus. Figs. 1 to 3 showthree different sets of rolls for carrying out the operation. Fig. 4shows a finished section, produced by a further in- Fig. 5 shows anothershape of the finished section ron. I Atube 6 (Fig.1) preferably rolledwithout seam and made in the customary way constitutes the startingmaterial for the individual member a of the sheet-piling shown in Fig.4. This tube is passed, preferably when hot, through shaping rolls a, d,which press it flat between their grooves c, d, whilst simultaneouslythe sides of the tube are fiattened against thecollar edges 6, f of therolls. The barrel-shaped section (1 thus obtained is then passed throughother rolls 9 and h (Fig. 2) which, whilst further flattening thesection on one side by means of the collar 30 edges 9, h also make theintroverts i in the section. Another roll 70 operates on the material atthe opposite narrow side of the barrel-shaped section and produces at ma chan nel-shaped introvert. the operations (Fig. 3) the introverts '1?are made deeper by passing the section between rolls n and 0, so that afillet-like connecting member p projecting outwards is formed on oneside of the. section iron. At the other side the edges m of thechannel-shaped introvert m are pressed inwards by the rolls n and 0against a third roll 9 located on one side There is thus imparted to theintrovert a shape the inside of which corresponds as faras possible withthe outside of the fillet.

If necessary, by means offurther tools constructed as rolls ordie-plates, a further operation may take place on the piles, for exam-At the. third stage of 85 v i vention.

ple, a closer approximation to the rectangular form, so that ultimatelythe finished section as shown in Fig. 4: has an exact rectangular middleportion, to one side of which is attached the trapezoidal fillet p, andto the other side the undercut introvert m of similar shape.

The manufacture of the section as shown in Fig. 5 is effected byessentially similar operations, save that in this case by means of adifferent contour of the rolls at g and h and of correspondinglynarrower construction of the rolls 7c and q, there is formed on one sidea guide rod 72 of almost circular shape, and similarly at the other sidethe guide socket m as enclosure for around rod instead of a trapezoidalfillet. i

It is to he understood that the invention is not limited to the specialshape of the rolls used, and consequently not to any special shape ofthe final product. Many modifications are possible Within the scope ofthe inlVhilst the sections as shown in Fig. 4 provide a fairly rigidconnection between adjacent box-shaped sections, the sections as shownin Fig. 5 allow of a certain flexibility. It is obvious that by suitablyshaping the fillet and channel m it is possible to obtain acomparatively large side movement of the section.

We claim as our invention 1. Apparatus for producing metal members ofbox-shaped cross section with integral male and female portionspermitting interlocking with other similar members as described,comprising a first pair of-parallel rolls having a contour adapted tochange the cross sectional shape of a tube from circular to barrelshape, a second set of rolls co-ope-rat-ing comprising two parallelrolls and a third roll on an axis at right angles for producing adovetail shape at one end of the section and simultaneously a re-entrantportion or introvert at the other end, and a third set of three rollssimilar to the previously mentioned set of three rolls but of such shapeas to' produce substantially the final dovetail shape of one end of thesection and simultaneously to produce substantially the final shape ofthe introvert on the other end of the secvert at the other end, a thirdset of three rolls similar to the previously mentioned set of

